A075280 Interprimes which are of the form s*prime, s=5.

15, 205, 515, 1465, 1795, 1895, 2105, 3265, 3505, 3665, 4105, 4415, 4535, 4555, 4685, 5045, 6185, 7115, 7835, 8135, 8185, 9655, 9865, 10085, 10645, 11015, 11405, 12085, 12295, 12385, 13235, 14395, 16045, 16355, 16735, 17065

Offset: 1

Author

Zak Seidov, Sep 12 2002

Keywords

• easy
• nonn

Comments

Interprimes which are of the form s*prime are in A075277-A075296 (s = 2-21). Case s = 1 is impossible.

Examples

			205 is an interprime and 205/5 = 41 is prime.
		

Crossrefs

Cf. A075277-A075296.

Programs

Mathematica

s=5; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]